A guide book or travel guide is a book of information about a place designed for the use of visitors or tourists. It will usually include information about sights, accommodation, restaurants, transportation, and activities.

The fundamental purpose of a travel guide—whether it’s a physical book, a digital app, or a professional human guide—is to curate and contextualize the vast amount of information about a destination to enhance the traveler's experience. A good guide acts as a filter, highlighting the "must-see" landmarks while providing deeper historical, cultural, and social insights that a visitor wouldn't necessarily notice on their own. For example, a guide doesn't just show you a temple; it explains the architectural symbolism and the religious rituals taking place within it. Beyond education, guides provide logistical peace of mind by offering vetted recommendations for dining, transportation, and safety, helping travelers avoid common "tourist traps" and navigate unfamiliar customs. In the modern age of information overload, the role of the travel guide has shifted from being a mere source of "facts" to being a trusted "storyteller" and "navigator" who helps travelers maximize their limited time and create more meaningful, authentic connections with the places they visit.